N days# | Mean | Minimum | 25% | Median | 75% | Maximum | |
Number concentrations cm−3 | |||||||
NC0.01–0.1 | 145 | 17300 | 3272 | 9286 | 16940 | 24484 | 46195 |
NC0.1–0.5 | 147 | 2005 | 291 | 958 | 1610 | 2767 | 6700 |
NC0.5–2.5 | 141 | 21.4 | 0.9 | 5.6 | 13.0 | 31.6 | 127.6 |
Mass concentrations µg·m−3 | |||||||
MC0.1–0.5 | 147 | 24.8 | 2.4 | 11.4 | 19.6 | 33.1 | 108.3 |
MC0.01–2.5 | 142 | 30.3 | 3.6 | 13.5 | 24.6 | 41.3 | 133.8 |
PM2.5–10 | 140 | 10.3 | −8.7 | 2.9 | 6.9 | 14.6 | 64.3 |
PM10 | 148 | 45.4 | 4.7 | 19.6 | 35.0 | 59.7 | 172.4 |
Gases | |||||||
NO2 µg·m−3 | 157 | 46 | 8 | 34 | 45 | 56 | 119 |
CO mg·m−3 | 156 | 0.9 | 0.3 | 0.5 | 0.8 | 1.2 | 3.0 |
SO2 µg·m−3 | 152 | 24.0 | 0.1 | 8.4 | 15.9 | 29.3 | 114.7 |
Temperature °C | 152 | 2.6 | −17.3 | −1.2 | 3.0 | 7.9 | 18.7 |
Inhaled short-acting β2-agonists¶ | 151 | 79 | 69 | 76 | 79 | 81 | 90 |
Inhaled corticosteroids+ | 153 | 88 | 80 | 85 | 88 | 91 | 96 |
Wheezing %§ | 146 | 20 | 10 | 16 | 20 | 23 | 34 |
Attack of shortness of breath and wheezing | 146 | 13 | 3 | 10 | 13 | 17 | 27 |
Waking up with breathing problems | 146 | 23 | 9 | 18 | 22 | 26 | 45 |
Shortness of breath | 146 | 28 | 15 | 23 | 27 | 32 | 47 |
Phlegm | 146 | 27 | 14 | 24 | 27 | 30 | 44 |
Cough | 146 | 27 | 11 | 22 | 26 | 31 | 47 |
Data are presented as % unless otherwise stated
NC: number concentration of particles (numbers represent diameter of particles in µm)
MC: mass concentration of particles (numbers represent diameter of particles in µm)
PM2.5–10: particulate matter with a 2.5–10 µm aerodynamic diameter
PM10: particulate matter <10 µm in aerodynamic diameter
NO2: nitrogen dioxide
CO: carbon monoxide
SO2: sulphur dioxide
#: maximum number of days was 157. Lower numbers in the prevalence time series are caused by the rule of excluding days with <50% of data
¶: prevalence calculated in the 42 participants who ever reported use of β2-agonists
+: prevalence calculated in the 44 participants who ever reported use of corticosteroids
§: prevalence calculated in all 53 participants for symptoms